package com.iotek.bookstore.web.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter("/login/*")
public class LoginFilter implements Filter {
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)servletRequest;
        HttpServletResponse response=(HttpServletResponse)servletResponse;
        HttpSession session=request.getSession(false);
        if(session==null||session.getAttribute("userName")==null){
           request.getRequestDispatcher("/login.jsp").forward(request,response);
            return;
        }
        filterChain.doFilter(servletRequest,servletResponse);
    }

    public void destroy() {

    }
}
